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determine the molarity of the solution that is prepared as follows: 73.0 g of magnesium of nitrate is dissolved in enough water to make 550.0mL of solution. molarity
A weak acid HX has Ka = 1.00×10-6. What would be the pH of a 0.10 M solution of HX in water?
How much heat is evolved in converting 1.00 mol of steam at 130.0 C to ice at -50.0 C? The heat capacity of steam is 2.01 J/g*C and of ice is 2.09 J/g*C.
Isotope 1 has a mass of 107.0 amu and an abundance of 55.9%. Isotope 2 has a mass of 109.0 amu. What is the atomic mass of the element?
A sample of air contains 11.4 µg/m^3 of beryllium dust. How many atoms of beryllium are present in a room with dimensions of 19.1 feet by 12 feet by 13.3 feet? Answer in units of atoms.
Calculate the final temperature of 32 mL of ethanol initially at 11 degrees C upon absorption of 562 J of heat.
Calculate the volume of O2 at STP, required for the complete combustion of 175 g octane (C8H18) to CO2 and H2O?
Boron nitride, BN, has a graphite-like layered structure in which the layers have eclipsed alignment where the B and N atoms in alternative layers in the direction perpendicular to the layers. Rationalize the difference between this structure and ..
Use balanced equations to determine whether either Fe(OH)2 or CuS has a different solubility with a change in pH:CuS changes solubility with changing pH. Fe(OH)2 does not change solubility.
calculate the amount of energy necessary to vaporize 10 g of acetone at its boiling point if the heat of vaporization is 29.1 kJ/mol.
Draw structural formulas for all of the structural isomers of C4H10, C5H12 and C3H7Cl.
What is the wavelength (in nm) of a photon emitted during transition
A 4.40 g nugget of pure gold absorbed 289 J of heat. The initial temperature was 21.0°C. What was the final temperature?
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